aboutsummaryrefslogtreecommitdiffstats
path: root/wiretap/wtap.c
blob: bdc74adcbf0d103a1b6c04237b202df08227371f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
/* wtap.c
 *
 * Wiretap Library
 * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include <config.h>

#include <string.h>
#include <errno.h>

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#include "wtap-int.h"
#include "wtap_opttypes.h"
#include "pcapng.h"

#include "file_wrappers.h"
#include <wsutil/file_util.h>
#include <wsutil/buffer.h>

#ifdef HAVE_PLUGINS

#include <wsutil/plugins.h>

/*
 * List of wiretap plugins.
 */
typedef struct {
	void (*register_wtap_module)(void);  /* routine to call to register a wiretap module */
} wtap_plugin;

static GSList *wtap_plugins = NULL;

/*
 * Callback for each plugin found.
 */
static gboolean
check_for_wtap_plugin(GModule *handle)
{
	gpointer gp;
	wtap_plugin *plugin;

	/*
	 * Do we have a register_wtap_module routine?
	 */
	if (!g_module_symbol(handle, "register_wtap_module", &gp)) {
		/* No, so this isn't a wiretap module plugin. */
		return FALSE;
	}

	/*
	 * Yes - this plugin includes one or more wiretap modules.
	 * Add this one to the list of wiretap module plugins.
	 */
	plugin = (wtap_plugin *)g_malloc(sizeof (wtap_plugin));
DIAG_OFF(pedantic)
	plugin->register_wtap_module = (void (*)(void))gp;
DIAG_ON(pedantic)
	wtap_plugins = g_slist_append(wtap_plugins, plugin);
	return TRUE;
}

void
wtap_register_plugin_types(void)
{
	/* Piggyback the initialization here for now */
	wtap_opttypes_initialize();

	add_plugin_type("libwiretap", check_for_wtap_plugin);
}

static void
register_wtap_module_plugin(gpointer data, gpointer user_data _U_)
{
	wtap_plugin *plugin = (wtap_plugin *)data;

	(plugin->register_wtap_module)();
}

/*
 * For all wiretap module plugins, call their register routines.
 */
void
register_all_wiretap_modules(void)
{
	g_slist_foreach(wtap_plugins, register_wtap_module_plugin, NULL);
}
#endif /* HAVE_PLUGINS */

/*
 * Return the size of the file, as reported by the OS.
 * (gint64, in case that's 64 bits.)
 */
gint64
wtap_file_size(wtap *wth, int *err)
{
	ws_statb64 statb;

	if (file_fstat((wth->fh == NULL) ? wth->random_fh : wth->fh,
	    &statb, err) == -1)
		return -1;
	return statb.st_size;
}

/*
 * Do an fstat on the file.
 */
int
wtap_fstat(wtap *wth, ws_statb64 *statb, int *err)
{
	if (file_fstat((wth->fh == NULL) ? wth->random_fh : wth->fh,
	    statb, err) == -1)
		return -1;
	return 0;
}

int
wtap_file_type_subtype(wtap *wth)
{
	return wth->file_type_subtype;
}

gboolean
wtap_iscompressed(wtap *wth)
{
	return file_iscompressed((wth->fh == NULL) ? wth->random_fh : wth->fh);
}

guint
wtap_snapshot_length(wtap *wth)
{
	return wth->snapshot_length;
}

int
wtap_file_encap(wtap *wth)
{
	return wth->file_encap;
}

int
wtap_file_tsprec(wtap *wth)
{
	return wth->file_tsprec;
}

const gchar *
wtap_file_get_shb_comment(wtap *wth)
{
	char* opt_comment;
	if (wth == NULL)
		return NULL;

	wtap_optionblock_get_option_string(wth->shb_hdr, OPT_COMMENT, &opt_comment);
	return opt_comment;
}

wtap_optionblock_t
wtap_file_get_shb(wtap *wth)
{
	return wth ? wth->shb_hdr : NULL;
}

wtap_optionblock_t
wtap_file_get_shb_for_new_file(wtap *wth)
{
	wtap_optionblock_t shb_hdr;
	char* opt_comment;

	if (wth == NULL)
		return NULL;

	shb_hdr = wtap_optionblock_create(WTAP_OPTION_BLOCK_NG_SECTION);

	/* options */
	wtap_optionblock_get_option_string(wth->shb_hdr, OPT_COMMENT, &opt_comment);
	wtap_optionblock_set_option_string(shb_hdr, OPT_COMMENT, opt_comment, (gsize)(opt_comment ? strlen(opt_comment) : 0));

	return shb_hdr;
}

const gchar*
wtap_get_nrb_comment(wtap *wth)
{
	char* opt_comment;
	g_assert(wth);

	if ((wth == NULL) || (wth->nrb_hdr == NULL))
		return NULL;

	wtap_optionblock_get_option_string(wth->nrb_hdr, OPT_COMMENT, &opt_comment);
	return opt_comment;
}

void
wtap_write_nrb_comment(wtap *wth, gchar *comment)
{
	g_assert(wth);

	if (wth == NULL)
		return;

	if (wth->nrb_hdr == NULL) {
		wth->nrb_hdr = wtap_optionblock_create(WTAP_OPTION_BLOCK_NG_NRB);
	}

	wtap_optionblock_set_option_string(wth->nrb_hdr, OPT_COMMENT, comment, (gsize)(comment ? strlen(comment) : 0));
}

void
wtap_write_shb_comment(wtap *wth, gchar *comment)
{
	wtap_optionblock_set_option_string(wth->shb_hdr, OPT_COMMENT, comment, (gsize)(comment ? strlen(comment) : 0));
}

wtapng_iface_descriptions_t *
wtap_file_get_idb_info(wtap *wth)
{
	wtapng_iface_descriptions_t *idb_info;

	idb_info = g_new(wtapng_iface_descriptions_t,1);

	idb_info->interface_data	= wth->interface_data;

	return idb_info;
}


void
wtap_free_idb_info(wtapng_iface_descriptions_t *idb_info)
{
	if (idb_info == NULL)
		return;

	if (idb_info->interface_data) {
		guint i;
		for (i = 0; i < idb_info->interface_data->len; i++) {
			wtap_optionblock_t idb = g_array_index(idb_info->interface_data, wtap_optionblock_t, i);
			wtap_optionblock_free(idb);
		}
		g_array_free(idb_info->interface_data, TRUE);
	}

	g_free(idb_info);
}

gchar *
wtap_get_debug_if_descr(const wtap_optionblock_t if_descr,
                        const int indent,
                        const char* line_end)
{
	char* tmp_content;
	wtapng_if_descr_mandatory_t* if_descr_mand;
	GString *info = g_string_new("");
	guint64 tmp64;
	gint8 itmp8;
	guint8 tmp8;
	wtapng_if_descr_filter_t* if_filter;

	g_assert(if_descr);

	if_descr_mand = (wtapng_if_descr_mandatory_t*)wtap_optionblock_get_mandatory_data(if_descr);
	wtap_optionblock_get_option_string(if_descr, OPT_IDB_NAME, &tmp_content);
	g_string_printf(info,
			"%*cName = %s%s", indent, ' ',
			tmp_content ? tmp_content : "UNKNOWN",
			line_end);

	wtap_optionblock_get_option_string(if_descr, OPT_IDB_DESCR, &tmp_content);
	g_string_append_printf(info,
			"%*cDescription = %s%s", indent, ' ',
			tmp_content ? tmp_content : "NONE",
			line_end);

	g_string_append_printf(info,
			"%*cEncapsulation = %s (%d/%u - %s)%s", indent, ' ',
			wtap_encap_string(if_descr_mand->wtap_encap),
			if_descr_mand->wtap_encap,
			if_descr_mand->link_type,
			wtap_encap_short_string(if_descr_mand->wtap_encap),
			line_end);

	wtap_optionblock_get_option_uint64(if_descr, OPT_IDB_SPEED, &tmp64);
	g_string_append_printf(info,
			"%*cSpeed = %" G_GINT64_MODIFIER "u%s", indent, ' ',
			tmp64,
			line_end);

	g_string_append_printf(info,
			"%*cCapture length = %u%s", indent, ' ',
			if_descr_mand->snap_len,
			line_end);

	wtap_optionblock_get_option_uint8(if_descr, OPT_IDB_FCSLEN, &itmp8);
	g_string_append_printf(info,
			"%*cFCS length = %d%s", indent, ' ',
			itmp8,
			line_end);

	g_string_append_printf(info,
			"%*cTime precision = %s (%d)%s", indent, ' ',
			wtap_tsprec_string(if_descr_mand->tsprecision),
			if_descr_mand->tsprecision,
			line_end);

	g_string_append_printf(info,
			"%*cTime ticks per second = %" G_GINT64_MODIFIER "u%s", indent, ' ',
			if_descr_mand->time_units_per_second,
			line_end);

	wtap_optionblock_get_option_uint8(if_descr, OPT_IDB_TSRESOL, &tmp8);
	g_string_append_printf(info,
			"%*cTime resolution = 0x%.2x%s", indent, ' ',
			tmp8,
			line_end);

	wtap_optionblock_get_option_custom(if_descr, OPT_IDB_FILTER, (void**)&if_filter);
	g_string_append_printf(info,
			"%*cFilter string = %s%s", indent, ' ',
			if_filter->if_filter_str ? if_filter->if_filter_str : "NONE",
			line_end);

	wtap_optionblock_get_option_string(if_descr, OPT_IDB_OS, &tmp_content);
	g_string_append_printf(info,
			"%*cOperating system = %s%s", indent, ' ',
			tmp_content ? tmp_content : "UNKNOWN",
			line_end);

	wtap_optionblock_get_option_string(if_descr, OPT_COMMENT, &tmp_content);
	g_string_append_printf(info,
			"%*cComment = %s%s", indent, ' ',
			tmp_content ? tmp_content : "NONE",
			line_end);

	g_string_append_printf(info,
			"%*cBPF filter length = %u%s", indent, ' ',
			if_filter->bpf_filter_len,
			line_end);

	g_string_append_printf(info,
			"%*cNumber of stat entries = %u%s", indent, ' ',
			if_descr_mand->num_stat_entries,
			line_end);

	return g_string_free(info, FALSE);
}

wtap_optionblock_t
wtap_file_get_nrb_for_new_file(wtap *wth)
{
	wtap_optionblock_t nrb_hdr;

	if (wth == NULL || wth->nrb_hdr == NULL)
		return NULL;

	nrb_hdr = wtap_optionblock_create(WTAP_OPTION_BLOCK_NG_NRB);

	wtap_optionblock_copy_options(nrb_hdr, wth->nrb_hdr);
	return nrb_hdr;
}

/* Table of the encapsulation types we know about. */
struct encap_type_info {
	const char *name;
	const char *short_name;
};

static struct encap_type_info encap_table_base[] = {
	/* WTAP_ENCAP_UNKNOWN */
	{ "Unknown", "unknown" },

	/* WTAP_ENCAP_ETHERNET */
	{ "Ethernet", "ether" },

	/* WTAP_ENCAP_TOKEN_RING */
	{ "Token Ring", "tr" },

	/* WTAP_ENCAP_SLIP */
	{ "SLIP", "slip" },

	/* WTAP_ENCAP_PPP */
	{ "PPP", "ppp" },

	/* WTAP_ENCAP_FDDI */
	{ "FDDI", "fddi" },

	/* WTAP_ENCAP_FDDI_BITSWAPPED */
	{ "FDDI with bit-swapped MAC addresses", "fddi-swapped" },

	/* WTAP_ENCAP_RAW_IP */
	{ "Raw IP", "rawip" },

	/* WTAP_ENCAP_ARCNET */
	{ "ARCNET", "arcnet" },

	/* WTAP_ENCAP_ARCNET_LINUX */
	{ "Linux ARCNET", "arcnet_linux" },

	/* WTAP_ENCAP_ATM_RFC1483 */
	{ "RFC 1483 ATM", "atm-rfc1483" },

	/* WTAP_ENCAP_LINUX_ATM_CLIP */
	{ "Linux ATM CLIP", "linux-atm-clip" },

	/* WTAP_ENCAP_LAPB */
	{ "LAPB", "lapb" },

	/* WTAP_ENCAP_ATM_PDUS */
	{ "ATM PDUs", "atm-pdus" },

	/* WTAP_ENCAP_ATM_PDUS_UNTRUNCATED */
	{ "ATM PDUs - untruncated", "atm-pdus-untruncated" },

	/* WTAP_ENCAP_NULL */
	{ "NULL/Loopback", "null" },

	/* WTAP_ENCAP_ASCEND */
	{ "Lucent/Ascend access equipment", "ascend" },

	/* WTAP_ENCAP_ISDN */
	{ "ISDN", "isdn" },

	/* WTAP_ENCAP_IP_OVER_FC */
	{ "RFC 2625 IP-over-Fibre Channel", "ip-over-fc" },

	/* WTAP_ENCAP_PPP_WITH_PHDR */
	{ "PPP with Directional Info", "ppp-with-direction" },

	/* WTAP_ENCAP_IEEE_802_11 */
	{ "IEEE 802.11 Wireless LAN", "ieee-802-11" },

	/* WTAP_ENCAP_IEEE_802_11_PRISM */
	{ "IEEE 802.11 plus Prism II monitor mode radio header", "ieee-802-11-prism" },

	/* WTAP_ENCAP_IEEE_802_11_WITH_RADIO */
	{ "IEEE 802.11 Wireless LAN with radio information", "ieee-802-11-radio" },

	/* WTAP_ENCAP_IEEE_802_11_RADIOTAP */
	{ "IEEE 802.11 plus radiotap radio header", "ieee-802-11-radiotap" },

	/* WTAP_ENCAP_IEEE_802_11_AVS */
	{ "IEEE 802.11 plus AVS radio header", "ieee-802-11-avs" },

	/* WTAP_ENCAP_SLL */
	{ "Linux cooked-mode capture", "linux-sll" },

	/* WTAP_ENCAP_FRELAY */
	{ "Frame Relay", "frelay" },

	/* WTAP_ENCAP_FRELAY_WITH_PHDR */
	{ "Frame Relay with Directional Info", "frelay-with-direction" },

	/* WTAP_ENCAP_CHDLC */
	{ "Cisco HDLC", "chdlc" },

	/* WTAP_ENCAP_CISCO_IOS */
	{ "Cisco IOS internal", "ios" },

	/* WTAP_ENCAP_LOCALTALK */
	{ "Localtalk", "ltalk" },

	/* WTAP_ENCAP_OLD_PFLOG  */
	{ "OpenBSD PF Firewall logs, pre-3.4", "pflog-old" },

	/* WTAP_ENCAP_HHDLC */
	{ "HiPath HDLC", "hhdlc" },

	/* WTAP_ENCAP_DOCSIS */
	{ "Data Over Cable Service Interface Specification", "docsis" },

	/* WTAP_ENCAP_COSINE */
	{ "CoSine L2 debug log", "cosine" },

	/* WTAP_ENCAP_WFLEET_HDLC */
	{ "Wellfleet HDLC", "whdlc" },

	/* WTAP_ENCAP_SDLC */
	{ "SDLC", "sdlc" },

	/* WTAP_ENCAP_TZSP */
	{ "Tazmen sniffer protocol", "tzsp" },

	/* WTAP_ENCAP_ENC */
	{ "OpenBSD enc(4) encapsulating interface", "enc" },

	/* WTAP_ENCAP_PFLOG  */
	{ "OpenBSD PF Firewall logs", "pflog" },

	/* WTAP_ENCAP_CHDLC_WITH_PHDR */
	{ "Cisco HDLC with Directional Info", "chdlc-with-direction" },

	/* WTAP_ENCAP_BLUETOOTH_H4 */
	{ "Bluetooth H4", "bluetooth-h4" },

	/* WTAP_ENCAP_MTP2 */
	{ "SS7 MTP2", "mtp2" },

	/* WTAP_ENCAP_MTP3 */
	{ "SS7 MTP3", "mtp3" },

	/* WTAP_ENCAP_IRDA */
	{ "IrDA", "irda" },

	/* WTAP_ENCAP_USER0 */
	{ "USER 0", "user0" },

	/* WTAP_ENCAP_USER1 */
	{ "USER 1", "user1" },

	/* WTAP_ENCAP_USER2 */
	{ "USER 2", "user2" },

	/* WTAP_ENCAP_USER3 */
	{ "USER 3", "user3" },

	/* WTAP_ENCAP_USER4 */
	{ "USER 4", "user4" },

	/* WTAP_ENCAP_USER5 */
	{ "USER 5", "user5" },

	/* WTAP_ENCAP_USER6 */
	{ "USER 6", "user6" },

	/* WTAP_ENCAP_USER7 */
	{ "USER 7", "user7" },

	/* WTAP_ENCAP_USER8 */
	{ "USER 8", "user8" },

	/* WTAP_ENCAP_USER9 */
	{ "USER 9", "user9" },

	/* WTAP_ENCAP_USER10 */
	{ "USER 10", "user10" },

	/* WTAP_ENCAP_USER11 */
	{ "USER 11", "user11" },

	/* WTAP_ENCAP_USER12 */
	{ "USER 12", "user12" },

	/* WTAP_ENCAP_USER13 */
	{ "USER 13", "user13" },

	/* WTAP_ENCAP_USER14 */
	{ "USER 14", "user14" },

	/* WTAP_ENCAP_USER15 */
	{ "USER 15", "user15" },

	/* WTAP_ENCAP_SYMANTEC */
	{ "Symantec Enterprise Firewall", "symantec" },

	/* WTAP_ENCAP_APPLE_IP_OVER_IEEE1394 */
	{ "Apple IP-over-IEEE 1394", "ap1394" },

	/* WTAP_ENCAP_BACNET_MS_TP */
	{ "BACnet MS/TP", "bacnet-ms-tp" },

	/* WTAP_ENCAP_NETTL_RAW_ICMP */
	{ "Raw ICMP with nettl headers", "raw-icmp-nettl" },

	/* WTAP_ENCAP_NETTL_RAW_ICMPV6 */
	{ "Raw ICMPv6 with nettl headers", "raw-icmpv6-nettl" },

	/* WTAP_ENCAP_GPRS_LLC */
	{ "GPRS LLC", "gprs-llc" },

	/* WTAP_ENCAP_JUNIPER_ATM1 */
	{ "Juniper ATM1", "juniper-atm1" },

	/* WTAP_ENCAP_JUNIPER_ATM2 */
	{ "Juniper ATM2", "juniper-atm2" },

	/* WTAP_ENCAP_REDBACK */
	{ "Redback SmartEdge", "redback" },

	/* WTAP_ENCAP_NETTL_RAW_IP */
	{ "Raw IP with nettl headers", "rawip-nettl" },

	/* WTAP_ENCAP_NETTL_ETHERNET */
	{ "Ethernet with nettl headers", "ether-nettl" },

	/* WTAP_ENCAP_NETTL_TOKEN_RING */
	{ "Token Ring with nettl headers", "tr-nettl" },

	/* WTAP_ENCAP_NETTL_FDDI */
	{ "FDDI with nettl headers", "fddi-nettl" },

	/* WTAP_ENCAP_NETTL_UNKNOWN */
	{ "Unknown link-layer type with nettl headers", "unknown-nettl" },

	/* WTAP_ENCAP_MTP2_WITH_PHDR */
	{ "MTP2 with pseudoheader", "mtp2-with-phdr" },

	/* WTAP_ENCAP_JUNIPER_PPPOE */
	{ "Juniper PPPoE", "juniper-pppoe" },

	/* WTAP_ENCAP_GCOM_TIE1 */
	{ "GCOM TIE1", "gcom-tie1" },

	/* WTAP_ENCAP_GCOM_SERIAL */
	{ "GCOM Serial", "gcom-serial" },

	/* WTAP_ENCAP_NETTL_X25 */
	{ "X.25 with nettl headers", "x25-nettl" },

	/* WTAP_ENCAP_K12 */
	{ "K12 protocol analyzer", "k12" },

	/* WTAP_ENCAP_JUNIPER_MLPPP */
	{ "Juniper MLPPP", "juniper-mlppp" },

	/* WTAP_ENCAP_JUNIPER_MLFR */
	{ "Juniper MLFR", "juniper-mlfr" },

	/* WTAP_ENCAP_JUNIPER_ETHER */
	{ "Juniper Ethernet", "juniper-ether" },

	/* WTAP_ENCAP_JUNIPER_PPP */
	{ "Juniper PPP", "juniper-ppp" },

	/* WTAP_ENCAP_JUNIPER_FRELAY */
	{ "Juniper Frame-Relay", "juniper-frelay" },

	/* WTAP_ENCAP_JUNIPER_CHDLC */
	{ "Juniper C-HDLC", "juniper-chdlc" },

	/* WTAP_ENCAP_JUNIPER_GGSN */
	{ "Juniper GGSN", "juniper-ggsn" },

	/* WTAP_ENCAP_LINUX_LAPD */
	{ "LAPD with Linux pseudo-header", "linux-lapd" },

	/* WTAP_ENCAP_CATAPULT_DCT2000 */
	{ "Catapult DCT2000", "dct2000" },

	/* WTAP_ENCAP_BER */
	{ "ASN.1 Basic Encoding Rules", "ber" },

	/* WTAP_ENCAP_JUNIPER_VP */
	{ "Juniper Voice PIC", "juniper-vp" },

	/* WTAP_ENCAP_USB */
	{ "Raw USB packets", "usb" },

	/* WTAP_ENCAP_IEEE802_16_MAC_CPS */
	{ "IEEE 802.16 MAC Common Part Sublayer", "ieee-802-16-mac-cps" },

	/* WTAP_ENCAP_NETTL_RAW_TELNET */
	{ "Raw telnet with nettl headers", "raw-telnet-nettl" },

	/* WTAP_ENCAP_USB_LINUX */
	{ "USB packets with Linux header", "usb-linux" },

	/* WTAP_ENCAP_MPEG */
	{ "MPEG", "mpeg" },

	/* WTAP_ENCAP_PPI */
	{ "Per-Packet Information header", "ppi" },

	/* WTAP_ENCAP_ERF */
	{ "Extensible Record Format", "erf" },

	/* WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR */
	{ "Bluetooth H4 with linux header", "bluetooth-h4-linux" },

	/* WTAP_ENCAP_SITA */
	{ "SITA WAN packets", "sita-wan" },

	/* WTAP_ENCAP_SCCP */
	{ "SS7 SCCP", "sccp" },

	/* WTAP_ENCAP_BLUETOOTH_HCI */
	{ "Bluetooth without transport layer", "bluetooth-hci" },

	/* WTAP_ENCAP_IPMB */
	{ "Intelligent Platform Management Bus", "ipmb" },

	/* WTAP_ENCAP_IEEE802_15_4 */
	{ "IEEE 802.15.4 Wireless PAN", "wpan" },

	/* WTAP_ENCAP_X2E_XORAYA */
	{ "X2E Xoraya", "x2e-xoraya" },

	/* WTAP_ENCAP_FLEXRAY */
	{ "FlexRay", "flexray" },

	/* WTAP_ENCAP_LIN */
	{ "Local Interconnect Network", "lin" },

	/* WTAP_ENCAP_MOST */
	{ "Media Oriented Systems Transport", "most" },

	/* WTAP_ENCAP_CAN20B */
	{ "Controller Area Network 2.0B", "can20b" },

	/* WTAP_ENCAP_LAYER1_EVENT */
	{ "EyeSDN Layer 1 event", "layer1-event" },

	/* WTAP_ENCAP_X2E_SERIAL */
	{ "X2E serial line capture", "x2e-serial" },

	/* WTAP_ENCAP_I2C */
	{ "I2C", "i2c" },

	/* WTAP_ENCAP_IEEE802_15_4_NONASK_PHY */
	{ "IEEE 802.15.4 Wireless PAN non-ASK PHY", "wpan-nonask-phy" },

	/* WTAP_ENCAP_TNEF */
	{ "Transport-Neutral Encapsulation Format", "tnef" },

	/* WTAP_ENCAP_USB_LINUX_MMAPPED */
	{ "USB packets with Linux header and padding", "usb-linux-mmap" },

	/* WTAP_ENCAP_GSM_UM */
	{ "GSM Um Interface", "gsm_um" },

	/* WTAP_ENCAP_DPNSS */
	{ "Digital Private Signalling System No 1 Link Layer", "dpnss_link" },

	/* WTAP_ENCAP_PACKETLOGGER */
	{ "PacketLogger", "packetlogger" },

	/* WTAP_ENCAP_NSTRACE_1_0 */
	{ "NetScaler Encapsulation 1.0 of Ethernet", "nstrace10" },

	/* WTAP_ENCAP_NSTRACE_2_0 */
	{ "NetScaler Encapsulation 2.0 of Ethernet", "nstrace20" },

	/* WTAP_ENCAP_FIBRE_CHANNEL_FC2 */
	{ "Fibre Channel FC-2", "fc2" },

	/* WTAP_ENCAP_FIBRE_CHANNEL_FC2_WITH_FRAME_DELIMS */
	{ "Fibre Channel FC-2 With Frame Delimiter", "fc2sof"},

	/* WTAP_ENCAP_JPEG_JFIF */
	{ "JPEG/JFIF", "jfif" },

	/* WTAP_ENCAP_IPNET */
	{ "Solaris IPNET", "ipnet" },

	/* WTAP_ENCAP_SOCKETCAN */
	{ "SocketCAN", "socketcan" },

	/* WTAP_ENCAP_IEEE_802_11_NETMON */
	{ "IEEE 802.11 plus Network Monitor radio header", "ieee-802-11-netmon" },

	/* WTAP_ENCAP_IEEE802_15_4_NOFCS */
	{ "IEEE 802.15.4 Wireless PAN with FCS not present", "wpan-nofcs" },

	/* WTAP_ENCAP_RAW_IPFIX */
	{ "IPFIX", "ipfix" },

	/* WTAP_ENCAP_RAW_IP4 */
	{ "Raw IPv4", "rawip4" },

	/* WTAP_ENCAP_RAW_IP6 */
	{ "Raw IPv6", "rawip6" },

	/* WTAP_ENCAP_LAPD */
	{ "LAPD", "lapd" },

	/* WTAP_ENCAP_DVBCI */
	{ "DVB-CI (Common Interface)", "dvbci"},

	/* WTAP_ENCAP_MUX27010 */
	{ "MUX27010", "mux27010"},

	/* WTAP_ENCAP_MIME */
	{ "MIME", "mime" },

	/* WTAP_ENCAP_NETANALYZER */
	{ "netANALYZER", "netanalyzer" },

	/* WTAP_ENCAP_NETANALYZER_TRANSPARENT */
	{ "netANALYZER-Transparent", "netanalyzer-transparent" },

	/* WTAP_ENCAP_IP_OVER_IB */
	{ "IP over Infiniband", "ip-over-ib" },

	/* WTAP_ENCAP_MPEG_2_TS */
	{ "ISO/IEC 13818-1 MPEG2-TS", "mp2ts" },

	/* WTAP_ENCAP_PPP_ETHER */
	{ "PPP-over-Ethernet session", "pppoes" },

	/* WTAP_ENCAP_NFC_LLCP */
	{ "NFC LLCP", "nfc-llcp" },

	/* WTAP_ENCAP_NFLOG */
	{ "NFLOG", "nflog" },

	/* WTAP_ENCAP_V5_EF */
	{ "V5 Envelope Function", "v5-ef" },

	/* WTAP_ENCAP_BACNET_MS_TP_WITH_PHDR */
	{ "BACnet MS/TP with Directional Info", "bacnet-ms-tp-with-direction" },

	/* WTAP_ENCAP_IXVERIWAVE */
	{ "IxVeriWave header and stats block", "ixveriwave" },

	/* WTAP_ENCAP_SDH */
	{ "SDH", "sdh" },

	/* WTAP_ENCAP_DBUS */
	{ "D-Bus", "dbus" },

	/* WTAP_ENCAP_AX25_KISS */
	{ "AX.25 with KISS header", "ax25-kiss" },

	/* WTAP_ENCAP_AX25 */
	{ "Amateur Radio AX.25", "ax25" },

	/* WTAP_ENCAP_SCTP */
	{ "SCTP", "sctp" },

	/* WTAP_ENCAP_INFINIBAND */
	{ "InfiniBand", "infiniband" },

	/* WTAP_ENCAP_JUNIPER_SVCS */
	{ "Juniper Services", "juniper-svcs" },

	/* WTAP_ENCAP_USBPCAP */
	{ "USB packets with USBPcap header", "usb-usbpcap" },

	/* WTAP_ENCAP_RTAC_SERIAL */
	{ "RTAC serial-line", "rtac-serial" },

	/* WTAP_ENCAP_BLUETOOTH_LE_LL */
	{ "Bluetooth Low Energy Link Layer", "bluetooth-le-ll" },

	/* WTAP_ENCAP_WIRESHARK_UPPER_PDU */
	{ "Wireshark Upper PDU export", "wireshark-upper-pdu" },

	/* WTAP_ENCAP_STANAG_4607 */
	{ "STANAG 4607", "s4607" },

	/* WTAP_ENCAP_STANAG_5066_D_PDU */
	{ "STANAG 5066 Data Transfer Sublayer PDUs(D_PDU)", "s5066-dpdu"},

	/* WTAP_ENCAP_NETLINK */
	{ "Linux Netlink", "netlink" },

	/* WTAP_ENCAP_BLUETOOTH_LINUX_MONITOR */
	{ "Bluetooth Linux Monitor", "bluetooth-linux-monitor" },

	/* WTAP_ENCAP_BLUETOOTH_BREDR_BB */
	{ "Bluetooth BR/EDR Baseband RF", "bluetooth-bredr-bb-rf" },

	/* WTAP_ENCAP_BLUETOOTH_LE_LL_WITH_PHDR */
	{ "Bluetooth Low Energy Link Layer RF", "bluetooth-le-ll-rf" },

	/* WTAP_ENCAP_NSTRACE_3_0 */
	{ "NetScaler Encapsulation 3.0 of Ethernet", "nstrace30" },

	/* WTAP_ENCAP_LOGCAT */
	{ "Android Logcat Binary format", "logcat" },

	/* WTAP_ENCAP_LOGCAT_BRIEF */
	{ "Android Logcat Brief text format", "logcat_brief" },

	/* WTAP_ENCAP_LOGCAT_PROCESS */
	{ "Android Logcat Process text format", "logcat_process" },

	/* WTAP_ENCAP_LOGCAT_TAG */
	{ "Android Logcat Tag text format", "logcat_tag" },

	/* WTAP_ENCAP_LOGCAT_THREAD */
	{ "Android Logcat Thread text format", "logcat_thread" },

	/* WTAP_ENCAP_LOGCAT_TIME */
	{ "Android Logcat Time text format", "logcat_time" },

	/* WTAP_ENCAP_LOGCAT_THREADTIME */
	{ "Android Logcat Threadtime text format", "logcat_threadtime" },

	/* WTAP_ENCAP_LOGCAT_LONG */
	{ "Android Logcat Long text format", "logcat_long" },

	/* WTAP_ENCAP_PKTAP */
	{ "Apple PKTAP", "pktap" },

	/* WTAP_ENCAP_EPON */
	{ "Ethernet Passive Optical Network", "epon" },

	/* WTAP_ENCAP_IPMI_TRACE */
	{ "IPMI Trace Data Collection", "ipmi-trace" },

	/* WTAP_ENCAP_LOOP */
	{ "OpenBSD loopback", "loop" },

	/* WTAP_ENCAP_JSON */
	{ "JavaScript Object Notation", "json" },

	/* WTAP_ENCAP_NSTRACE_3_5 */
	{ "NetScaler Encapsulation 3.5 of Ethernet", "nstrace35" },

	/* WTAP_ENCAP_ISO14443 */
	{ "ISO 14443 contactless smartcard standards", "iso14443" },

	/* WTAP_ENCAP_GFP_T */
	{ "ITU-T G.7041/Y.1303 Generic Framing Procedure Transparent mode", "gfp-t" },

	/* WTAP_ENCAP_GFP_F */
	{ "ITU-T G.7041/Y.1303 Generic Framing Procedure Frame-mapped mode", "gfp-f" }

};

WS_DLL_LOCAL
gint wtap_num_encap_types = sizeof(encap_table_base) / sizeof(struct encap_type_info);
static GArray* encap_table_arr = NULL;

#define encap_table_entry(encap)	\
	g_array_index(encap_table_arr, struct encap_type_info, encap)

static void wtap_init_encap_types(void) {

	if (encap_table_arr) return;

	encap_table_arr = g_array_new(FALSE,TRUE,sizeof(struct encap_type_info));

	g_array_append_vals(encap_table_arr,encap_table_base,wtap_num_encap_types);
}

int wtap_get_num_encap_types(void) {
	wtap_init_encap_types();
	return wtap_num_encap_types;
}


int wtap_register_encap_type(const char* name, const char* short_name) {
	struct encap_type_info e;
	wtap_init_encap_types();

	e.name = g_strdup(name);
	e.short_name = g_strdup(short_name);

	g_array_append_val(encap_table_arr,e);

	return wtap_num_encap_types++;
}


/* Name that should be somewhat descriptive. */
const char *
wtap_encap_string(int encap)
{
	if (encap < WTAP_ENCAP_PER_PACKET || encap >= WTAP_NUM_ENCAP_TYPES)
		return "Illegal";
	else if (encap == WTAP_ENCAP_PER_PACKET)
		return "Per packet";
	else
		return encap_table_entry(encap).name;
}

/* Name to use in, say, a command-line flag specifying the type. */
const char *
wtap_encap_short_string(int encap)
{
	if (encap < WTAP_ENCAP_PER_PACKET || encap >= WTAP_NUM_ENCAP_TYPES)
		return "illegal";
	else if (encap == WTAP_ENCAP_PER_PACKET)
		return "per-packet";
	else
		return encap_table_entry(encap).short_name;
}

/* Translate a short name to a capture file type. */
int
wtap_short_string_to_encap(const char *short_name)
{
	int encap;

	for (encap = 0; encap < WTAP_NUM_ENCAP_TYPES; encap++) {
		if (encap_table_entry(encap).short_name != NULL &&
		    strcmp(short_name, encap_table_entry(encap).short_name) == 0)
			return encap;
	}
	return -1;	/* no such encapsulation type */
}

const char*
wtap_tsprec_string(int tsprec)
{
	const char* s;
	switch (tsprec) {
		case WTAP_TSPREC_PER_PACKET:
			s = "per-packet";
			break;
		case WTAP_TSPREC_SEC:
			s = "seconds";
			break;
		case WTAP_TSPREC_DSEC:
			s = "deciseconds";
			break;
		case WTAP_TSPREC_CSEC:
			s = "centiseconds";
			break;
		case WTAP_TSPREC_MSEC:
			s = "milliseconds";
			break;
		case WTAP_TSPREC_USEC:
			s = "microseconds";
			break;
		case WTAP_TSPREC_NSEC:
			s = "nanoseconds";
			break;
		case WTAP_TSPREC_UNKNOWN:
		default:
			s = "UNKNOWN";
			break;
	}
	return s;
}

static const char *wtap_errlist[] = {
	/* WTAP_ERR_NOT_REGULAR_FILE */
	"The file isn't a plain file or pipe",

	/* WTAP_ERR_RANDOM_OPEN_PIPE */
	"The file is being opened for random access but is a pipe",

	/* WTAP_ERR_FILE_UNKNOWN_FORMAT */
	"The file isn't a capture file in a known format",

	/* WTAP_ERR_UNSUPPORTED */
	"File contains record data we don't support",

	/* WTAP_ERR_CANT_WRITE_TO_PIPE */
	"That file format cannot be written to a pipe",

	/* WTAP_ERR_CANT_OPEN */
	NULL,

	/* WTAP_ERR_UNWRITABLE_FILE_TYPE */
	"Files can't be saved in that format",

	/* WTAP_ERR_UNWRITABLE_ENCAP */
	"Packets with that network type can't be saved in that format",

	/* WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED */
	"That file format doesn't support per-packet encapsulations",

	/* WTAP_ERR_CANT_WRITE */
	"A write failed for some unknown reason",

	/* WTAP_ERR_CANT_CLOSE */
	NULL,

	/* WTAP_ERR_SHORT_READ */
	"Less data was read than was expected",

	/* WTAP_ERR_BAD_FILE */
	"The file appears to be damaged or corrupt",

	/* WTAP_ERR_SHORT_WRITE */
	"Less data was written than was requested",

	/* WTAP_ERR_UNC_OVERFLOW */
	"Uncompression error: data would overflow buffer",

	/* WTAP_ERR_RANDOM_OPEN_STDIN */
	"The standard input cannot be opened for random access",

	/* WTAP_ERR_COMPRESSION_NOT_SUPPORTED */
	"That file format doesn't support compression",

	/* WTAP_ERR_CANT_SEEK */
	NULL,

	/* WTAP_ERR_CANT_SEEK_COMPRESSED */
	NULL,

	/* WTAP_ERR_DECOMPRESS */
	"Uncompression error",

	/* WTAP_ERR_INTERNAL */
	"Internal error",

	/* WTAP_ERR_PACKET_TOO_LARGE */
	"The packet being written is too large for that format",

	/* WTAP_ERR_CHECK_WSLUA */
	NULL,

	/* WTAP_ERR_UNWRITABLE_REC_TYPE */
	"That record type cannot be written in that format",

	/* WTAP_ERR_UNWRITABLE_REC_DATA */
	"That record can't be written in that format"
};
#define	WTAP_ERRLIST_SIZE	(sizeof wtap_errlist / sizeof wtap_errlist[0])

const char *
wtap_strerror(int err)
{
	static char errbuf[128];
	unsigned int wtap_errlist_index;

	if (err < 0) {
		wtap_errlist_index = -1 - err;
		if (wtap_errlist_index >= WTAP_ERRLIST_SIZE) {
			g_snprintf(errbuf, 128, "Error %d", err);
			return errbuf;
		}
		if (wtap_errlist[wtap_errlist_index] == NULL)
			return "Unknown reason";
		return wtap_errlist[wtap_errlist_index];
	} else
		return g_strerror(err);
}

/* Close only the sequential side, freeing up memory it uses.

   Note that we do *not* want to call the subtype's close function,
   as it would free any per-subtype data, and that data may be
   needed by the random-access side.

   Instead, if the subtype has a "sequential close" function, we call it,
   to free up stuff used only by the sequential side. */
void
wtap_sequential_close(wtap *wth)
{
	if (wth->subtype_sequential_close != NULL)
		(*wth->subtype_sequential_close)(wth);

	if (wth->fh != NULL) {
		file_close(wth->fh);
		wth->fh = NULL;
	}

	if (wth->frame_buffer) {
		ws_buffer_free(wth->frame_buffer);
		g_free(wth->frame_buffer);
		wth->frame_buffer = NULL;
	}
}

static void
g_fast_seek_item_free(gpointer data, gpointer user_data _U_)
{
	g_free(data);
}

/*
 * Close the file descriptors for the sequential and random streams, but
 * don't discard any information about those streams.  Used on Windows if
 * we need to rename a file that we have open or if we need to rename on
 * top of a file we have open.
 */
void
wtap_fdclose(wtap *wth)
{
	if (wth->fh != NULL)
		file_fdclose(wth->fh);
	if (wth->random_fh != NULL)
		file_fdclose(wth->random_fh);
}

void
wtap_close(wtap *wth)
{
	guint i;
	wtap_optionblock_t wtapng_if_descr;

	wtap_sequential_close(wth);

	if (wth->subtype_close != NULL)
		(*wth->subtype_close)(wth);

	if (wth->random_fh != NULL)
		file_close(wth->random_fh);

	if (wth->priv != NULL)
		g_free(wth->priv);

	if (wth->fast_seek != NULL) {
		g_ptr_array_foreach(wth->fast_seek, g_fast_seek_item_free, NULL);
		g_ptr_array_free(wth->fast_seek, TRUE);
	}

	wtap_optionblock_free(wth->shb_hdr);

	for(i = 0; i < wth->interface_data->len; i++) {
		wtapng_if_descr = g_array_index(wth->interface_data, wtap_optionblock_t, i);
		wtap_optionblock_free(wtapng_if_descr);
	}
	g_array_free(wth->interface_data, TRUE);
	g_free(wth);
}

void
wtap_cleareof(wtap *wth) {
	/* Reset EOF */
	file_clearerr(wth->fh);
}

void wtap_set_cb_new_ipv4(wtap *wth, wtap_new_ipv4_callback_t add_new_ipv4) {
	if (wth)
		wth->add_new_ipv4 = add_new_ipv4;
}

void wtap_set_cb_new_ipv6(wtap *wth, wtap_new_ipv6_callback_t add_new_ipv6) {
	if (wth)
		wth->add_new_ipv6 = add_new_ipv6;
}

gboolean
wtap_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset)
{
	/*
	 * Set the packet encapsulation to the file's encapsulation
	 * value; if that's not WTAP_ENCAP_PER_PACKET, it's the
	 * right answer (and means that the read routine for this
	 * capture file type doesn't have to set it), and if it
	 * *is* WTAP_ENCAP_PER_PACKET, the caller needs to set it
	 * anyway.
	 *
	 * Do the same for the packet time stamp resolution.
	 */
	wth->phdr.pkt_encap = wth->file_encap;
	wth->phdr.pkt_tsprec = wth->file_tsprec;

	*err = 0;
	*err_info = NULL;
	if (!wth->subtype_read(wth, err, err_info, data_offset)) {
		/*
		 * If we didn't get an error indication, we read
		 * the last packet.  See if there's any deferred
		 * error, as might, for example, occur if we're
		 * reading a compressed file, and we got an error
		 * reading compressed data from the file, but
		 * got enough compressed data to decompress the
		 * last packet of the file.
		 */
		if (*err == 0)
			*err = file_error(wth->fh, err_info);
		return FALSE;	/* failure */
	}

	/*
	 * It makes no sense for the captured data length to be bigger
	 * than the actual data length.
	 */
	if (wth->phdr.caplen > wth->phdr.len)
		wth->phdr.caplen = wth->phdr.len;

	/*
	 * Make sure that it's not WTAP_ENCAP_PER_PACKET, as that
	 * probably means the file has that encapsulation type
	 * but the read routine didn't set this packet's
	 * encapsulation type.
	 */
	g_assert(wth->phdr.pkt_encap != WTAP_ENCAP_PER_PACKET);

	return TRUE;	/* success */
}

/*
 * Read a given number of bytes from a file.
 *
 * If we succeed, return TRUE.
 *
 * If we get an EOF, return FALSE with *err set to 0, reporting this
 * as an EOF.
 *
 * If we get fewer bytes than the specified number, return FALSE with
 * *err set to WTAP_ERR_SHORT_READ, reporting this as a short read
 * error.
 *
 * If we get a read error, return FALSE with *err and *err_info set
 * appropriately.
 */
gboolean
wtap_read_bytes_or_eof(FILE_T fh, void *buf, unsigned int count, int *err,
    gchar **err_info)
{
	int	bytes_read;

	bytes_read = file_read(buf, count, fh);
	if (bytes_read < 0 || (guint)bytes_read != count) {
		*err = file_error(fh, err_info);
		if (*err == 0 && bytes_read > 0)
			*err = WTAP_ERR_SHORT_READ;
		return FALSE;
	}
	return TRUE;
}

/*
 * Read a given number of bytes from a file.
 *
 * If we succeed, return TRUE.
 *
 * If we get fewer bytes than the specified number, including getting
 * an EOF, return FALSE with *err set to WTAP_ERR_SHORT_READ, reporting
 * this as a short read error.
 *
 * If we get a read error, return FALSE with *err and *err_info set
 * appropriately.
 */
gboolean
wtap_read_bytes(FILE_T fh, void *buf, unsigned int count, int *err,
    gchar **err_info)
{
	int	bytes_read;

	bytes_read = file_read(buf, count, fh);
	if (bytes_read < 0 || (guint)bytes_read != count) {
		*err = file_error(fh, err_info);
		if (*err == 0)
			*err = WTAP_ERR_SHORT_READ;
		return FALSE;
	}
	return TRUE;
}

/*
 * Read packet data into a Buffer, growing the buffer as necessary.
 *
 * This returns an error on a short read, even if the short read hit
 * the EOF immediately.  (The assumption is that each packet has a
 * header followed by raw packet data, and that we've already read the
 * header, so if we get an EOF trying to read the packet data, the file
 * has been cut short, even if the read didn't read any data at all.)
 */
gboolean
wtap_read_packet_bytes(FILE_T fh, Buffer *buf, guint length, int *err,
    gchar **err_info)
{
	ws_buffer_assure_space(buf, length);
	return wtap_read_bytes(fh, ws_buffer_start_ptr(buf), length, err,
	    err_info);
}

/*
 * Return an approximation of the amount of data we've read sequentially
 * from the file so far.  (gint64, in case that's 64 bits.)
 */
gint64
wtap_read_so_far(wtap *wth)
{
	return file_tell_raw(wth->fh);
}

struct wtap_pkthdr *
wtap_phdr(wtap *wth)
{
	return &wth->phdr;
}

guint8 *
wtap_buf_ptr(wtap *wth)
{
	return ws_buffer_start_ptr(wth->frame_buffer);
}

void
wtap_phdr_init(struct wtap_pkthdr *phdr)
{
	memset(phdr, 0, sizeof(struct wtap_pkthdr));
	ws_buffer_init(&phdr->ft_specific_data, 0);
}

void
wtap_phdr_cleanup(struct wtap_pkthdr *phdr)
{
	ws_buffer_free(&phdr->ft_specific_data);
}

gboolean
wtap_seek_read(wtap *wth, gint64 seek_off,
	struct wtap_pkthdr *phdr, Buffer *buf, int *err, gchar **err_info)
{
	/*
	 * Set the packet encapsulation to the file's encapsulation
	 * value; if that's not WTAP_ENCAP_PER_PACKET, it's the
	 * right answer (and means that the read routine for this
	 * capture file type doesn't have to set it), and if it
	 * *is* WTAP_ENCAP_PER_PACKET, the caller needs to set it
	 * anyway.
	 *
	 * Do the same for the packet time stamp resolution.
	 */
	phdr->pkt_encap = wth->file_encap;
	phdr->pkt_tsprec = wth->file_tsprec;

	if (!wth->subtype_seek_read(wth, seek_off, phdr, buf, err, err_info))
		return FALSE;

	/*
	 * It makes no sense for the captured data length to be bigger
	 * than the actual data length.
	 */
	if (phdr->caplen > phdr->len)
		phdr->caplen = phdr->len;

	/*
	 * Make sure that it's not WTAP_ENCAP_PER_PACKET, as that
	 * probably means the file has that encapsulation type
	 * but the read routine didn't set this packet's
	 * encapsulation type.
	 */
	g_assert(phdr->pkt_encap != WTAP_ENCAP_PER_PACKET);

	return TRUE;
}

/*
 * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 8
 * tab-width: 8
 * indent-tabs-mode: t
 * End:
 *
 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 * :indentSize=8:tabSize=8:noTabs=false:
 */